135.263 Flight time limitations and rest requirements: All certificate
(a) A certificate holder may assign a flight crewmember and a flight
crewmember may accept an assignment for flight time only when the applicable
requirements of §§135.263 through 135.271 are met.
(b) No certificate holder may assign any flight crewmember to any duty
with the certificate holder during any required rest period.
(c) Time spent in transportation, not local in character, that a
certificate holder requires of a flight crewmember and provides to transport
the crewmember to an airport at which he is to serve on a flight as a
crewmember, or from an airport at which he was relieved from duty to return
to his home station, is not considered part of a rest period.
(d) A flight crewmember is not considered to be assigned flight time in
excess of flight time limitations if the flights to which he is assigned
normally terminate within the limitations, but due to circumstances beyond
the control of the certificate holder or flight crewmember (such as adverse
weather conditions), are not at the time of departure expected to reach
their destination within the planned flight time.